Which of the following is true about Turner syndrome?

Discussing about options one by one, 1. False; Incidence of congenital hea disease was 30% in those with webbed neck and 9% of those with normal neck 2. False 3. True; Cardiac disease is seen in almost 80% of individuals with Noonan syndrome; Noonan syndrome is one of the most common genetic diseases associated with congenital hea defect, being second for frequency only to Down syndrome. 4. False; No such association seen till now.